Ventilator.



3c sway.

J. A. PIHL.

VENTILATOR.

APPLICATION FILED SEPT. 30, 1907. RENEWED FEB. 13,1909.

916,484, Patented Mar. 30, 1909.

2 SHEETS-SHEET 1.

I JMPW 2/98 in use:

attoznugr,

J. A. PIHL.

VENTILATOR.

APPLICATION FILED SEPT. 30, 1907. RENEWED FEB. 13,1909.

91 6,484. Patented Mar. 30, 1909.

2 SHEETS-SHEET 2.

Tn! name's PETERS co. munmarou. n. c

UNITED STATES PATENT ()Fhitlll.

JOHN AXEL llI-IL, OF FLOODWOOD, MINNESOTA.

VENTILATOR.

Specification of Letters Patent.

Patented March 30, 1909.

Application filed September 30, 1907, Serial No. 395,213. RenewedFebruary 13, 1909. Serial No. 477,764.

To all whom it may concern:

Be it known that I, JOHN A. PIHL, a citizen of the United States,residing at F loodwood, in the county of St. Louis, State of Minnesota,have invented certain new and useful Improvements in Ventilators; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to new and useful improvements in ventilators andit has more particular reference to a ventilator for single rooms and ofthat type which includes a pipe and a rotatable draft operated suctionfan, the object being to provide a novel construction, combination andarrangement of parts.

The details of construction will appear in the course of the followingdescription in which reference is had to the accompany ing drawingsforming a part of this specification, like characters of referencedesignating similar parts throughout the several views, wherein:

Figure 1 is a front elevation showing the ventilator in use. Fig. 2 is afront elevation showing the ventilator to be hereinafter specificalldescribed. Fig. 3 is a central longitudina sectional view through theventilator with the pi e closed. Fig. 4 is a detailed view of the atchfor the pipe above referred to. Fig. 5 is a detailed view of a keeperfor the latch shown in Fig. 4.

The ventilator comprehended in the present invention comprises a pipe 5which is set into an opening in the wall of the room and which projectsat each end beyond said wall, the pipe 5 having connection at its outerend with an elbow pipe (not shown) to prevent back drafts such as wouldtend to retard the action of the apparatus.

Spanning the pipe 5 at its inner end are bars 7 and 8 arranged in spacedrelation, the bar 7 being referably removable. At central points, t ebars 7 and 8 are constructed as bearings for the ends of a shaft 9 uponwhich is fixedly held a sleeve 10 provided with the radially extendingspaced, overlying fan blades 11. It will be apparent that the draftthrough the pipe 5 will rotate the fan blades 11 so that a suction iscreated by means of which dust and suspended matter is drawn from theroom.

on the lid 12.

The inner end of the pipe 5 is closed by a lid 12 which is provided witha flange 13 surrounding the end of the pi )c 5, the flange 13 havingconnection with a leaf 14 forming an element of a hinge joint 15.Projecting from the pipe 5 is a bracket 16 to which is connected one endof a retractilc coil spring 17, the other end of said spring havingconnection with an apcrtured car 18 provided The said lid is providedwith a raised strap 19 which constitutes a guide for a pivoted latchmember 20 carrying at its end a weight 21 and provided inwardly of saidweight with. a recess 22. A project ing keeper is carried at the innerend of the pipe 5, the keeper 23 having a beveled edge 24 and a recess25 in its upper edge. The recesses 22 and 25 ailord means whereby thecatch member may be engaged with the keeper to prevent the lid frombeing opened by the spring 19, as will be readily understood.

A pulley 26 is mounted upon the lid 12 the said pulley constituting aguide for a endent r0 )e 27 which is connected to the atch. member 20and by means of which said latch member may be raised or lowered. Apulley 28 is mounted upon the pipe 5, the pulley 2S constituting a guideover which passes pendent rope 27 which has its oppo site end connectedto the lid 12 by an eye 29 and by means of which said lid may be movedto close the end of the pipe 5.

It will be apparent that pulling on the rope 27 directly upon theextremity connected to the eye 29 and passing over pulley 28 will closethe lid and the latch then will automatically engage the keeper 23 byits own gravity. Now to release the latch member 20 it is necessary topull on the rope 27 to tension the extremity passing over guide pulley26 and connected to said latch memher and thereby raising the latter.

The invention is simple in its structural details inexpensive tomanufacture, and practical and cllicicnt in use.

hat is claimed, is,

A ventilator of the class described comprising a pipe for insertion intoa wall and adapted to project at one end a distance beyond the latter,ventilating means disposed within said pipe in close proximity to therojecting end thereof, a spring controlled lid hinged to said pipe andhaving an annular flange for frictional engagement with the In testimonywhereof, I aHiX my signaouteir face of the projecting (ind of the ailpgture, in presence of two Witnesses. to c ose the same means for ockinsaic i #1 T T in a closed position and means directl JOHN AkbL PlHL' 5operative upon the locking means to release i Witnesses:

the same and also directly operative upon RALPH ASGAARD, the lid toclose the latter. 1 H. A. BRANDMIER.

